Jeep Comanche 4x4 problem - JeepForum.com

 
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post #1 of 4 Old 12-21-2013, 06:51 PM Thread Starter
Manchild
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1987 MJ Comanche 
 
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Jeep Comanche 4x4 problem

I have a 87 jeep comanche, converted it to 4w4 2 years ago and just now finally got it running, had to get transfer case, replaced the switch on that. the four lines runnig to the switch were melted so i cut them and replaced sections with rubber hoses. then found out the vacuum lines were hooked up wrong. once i fixed that the light came on and 4x4 worked great, went in at any speed on the fly. recently it hasnt been working on the fly and i have to stop and go through the gears and then after a moment it will engage. what could be the cause of the slow engaging 4x4? another thing around 37-45 mph while in 4w4, when i give throttle the truck will shake when i let off it stops. if anyone could answer these questions it would be very much apprecative, thanks

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post #2 of 4 Old 12-22-2013, 04:36 PM
cruiser54
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Here's how the factory suggests you shift the transfer case and I've been doing this since these things were new and I worked at the dealership. Quoted from the owner's manual.

"To engage, shift the transfer case lever from 2H to 4H while the vehicle is moving at any legal speed". I let off the gas, throw the lever, and then tap the gas and let off.

4L position: " To engage, slow the vehicle to 2-3 MPH , shift the transmission to Neutral, then shift the transfer lever to the right and pull firmly rearward to 4L".

If you own a Renix Jeep, you'll want to check this out.

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post #3 of 4 Old 12-23-2013, 07:17 AM
cruiser54
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The front axle shift motor delaying because there's not enough vacuum, the diaphragm in it is bad, or the shift collar is bent, or the shift collar is sticking to the one side of the axle and requiring too much force to move it.

Just do this before you get stranded:

http://www.cherokeeforum.com/f51/fre...ss-91-a-38629/

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post #4 of 4 Old 12-30-2013, 08:24 AM
jjdavidson
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1989 MJ Comanche 
 
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Quote:
Originally Posted by cruiser54 View Post
The front axle shift motor delaying because there's not enough vacuum
here's couple topics of home made posilock
http://www.cherokeeforum.com/f51/hom...si-lock-78838/
http://www.jeepforum.com/forum/f12/h...ite-up-595515/
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